Automatic musical instrument with pneumatic control.



R. SAVOYE & U. DRYVERS.

AUTOMATIC MUSICAL INSTRUMENT WITH PNEUMATIC CONTROL.

APPLICATION FILED 1130.9, 1912. v

Patented Jan. 19, 1915.

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UNITE STATES PATENT OFFICE.

RENE SAVOYE, OF SEVRAN, AND URBAIN DRYVERS, OF PARIS, FRANCE.

AUTOMATIC MUSICAL INSTRUMENT JVITH PNEUMATIC CONTROL.

To aZZ whom it may concern Be it known that we, RENE Savors, a citizen of the Republic of France, and a resident or" S vra-n, Seine and Oise, France, and URBAIN Dni'i'vnns, a subject of the King of Belgium, and a resident of 3 Rue des Immeubles Industriels, Paris, France, have invented certain new and useful Improvements in Automatic Musical Instruments with Pneumatic Control, oi which the following is a specification.

This invention relates to improvements in or relating to automatic pneumatically controlled musical instruments.

Only an extremely limited space is avail able in ordinary pianos within which pneumatic control mechanism may be arranged. It is highly desirable therefore in such mechanism to reduce the space occupied by the pneumatic parts to the greatest extent possible. Moreover, it is advantageous to reduce as far as possible the number of parts which form the pneumatic device and also to unite these various parts in such manner that they are easily accessible and taken to pieces.

The present invention provides a construction designed to attain these ends.

Two constructions embodying the invention are illustrated by way of example in the accompanying drawing.

Figures 1 to 7 relate to the first construction; Fig. 1 is a cross section through the pneumatic mechanism at corresponding valves in the primary and secondary wind chests; Fig. 2 is a section on line 22 of Fig. 1, showing two groups of parts; Fig. 3 is a section on line 83 of Fig. 1, showing also two groups of parts; Fig. 4: is a plan of portion of the secondary wind chest showing valve apertures; Fig. 5 is a plan of a valve box for the secondary wind chest; Fig. 6 is a plan of the diaphragm box of the secondary; Fig. 7 is a plan of the diaphragm box of the primary; Fig. 8 is a longitudinal section through the axis of the parts of one of the notes; Fig. 9 is a section on line 99 of Fig. 8; Fig. 10 is an inverted plan of a modified form of valve box for the secondary; Fig. 11 is a plan of a modified form of diaphragm box for the secondary.

The wind pipe or air chamber of the secondary valve is formed by a metallic tube A (Figs. 1, 2, 3, 4, 8 and 9) of rectangular section and common to all the notes. The

Specification of Letters Patent.

Application filed December 9, 1912.

Patented Jan. 19, 1915. Serial No. 735,842.

tube A is provided, for each note, with a hole for the diaphragm a and a hole for the valve a; the latter hole is provided with a raised edge which serves as a seat for the valve (1. The mechanism moreover cmprises, for each note, a bellows, a valve box and a diphragm cap. The bellows is of known type. The valve box is made of metal and is formed either by a cast part B (Figs. 1, 2 and or by a stamped out part B (Figs. 8, 9 and The cap is made of metal and formed either by a cast part 0 (Figs. 1, 2 and 6) or by a stamped out part C (Figs. 8, 9 and 11).

The bellows, the valve box (B or B and the cap (C or C are connected together and kept on the tube A by means of four bolts.

The wind pipe or air primary valve is constituted by a metallic tube A of rectangular section and common to all the notes. The tube A is pro vided, for each note, with a hole for the diaphragm and with a hole for the valve Z).

The primary valve mechanism comprises also a valve box and diaphragm cap for each note-operating mechanism. The valve tube is constituted by a metallic tube D soldered onto the tube A the tube D is provided with a branch 0 which connects it to the cap C or C) of the secondary valve. The diaphragm cap E is made of metal and is formed either by a cast part (Figs. 1, 3 and '7) or by a stamped out part similar to the cap C of the secondary valve. The diaphragm cap E is fixed by four small bolts onto the web of an angleiron secured to the pipe A The arrangement just described has all the advantages inherent to wind chests enchamber 01": the

' tirely made of metal; the manufacture thereof is economical tight.

The height of the, said arrangement is less than that of the arrangements hitherto known. Moreover the pieces can be mounted and taken to pieces extremely easily, making it possible to easily control the working of each note.

The operation of the apparatus is the usual one. The tube which opens to the diaphragm box E of the primary communicates with the tracker board (not shown). The usual foot pumps, (not shown) suck air through the tubes A and A When the perforation in the music roll passes over an and they are always air aperture in the tracker bar the tube leading to the diaphragm e is opened, the dia-' Immediatelythe suction in the tube A lifts the diaphragm a and with it the valve a. The valve a being lifted, communication is established with the bellows and the latter is depressed by the suction in the tube A,

thus actuating the mechanism of the instrument in well known manner.

' 'We claim as our invention 1'. In a device of the character described, a pneumatic control system having a wind chest comprising a flattened rectangular metallic tube'common to all the notes and apertured on its opposite faces to receive on one face a valve and on the other face a diaphragm, in combination with a pair of recessed metallic members for each note ar-' ranged on opposite sides of said tube with their recesses in register w th the apertures in the latter and forming respectively a 'valve box and a diaphragm boX, together with bolts common to said recessed metallic members, passing through the same outside the areaof the wind chest and serving to hold said members in assembled position on the wind chest, substantially as described.

2. In a device of the character described, a pneumatic control system having a wind chest comprising a flattened rectangular metallic tube common to all the notes and apertured on its opposite faces to receive on the one face a valve and on the other face a diaphragm, in combination with, for each note, a tube soldered in the valve aperture to form a valve box, and a recessed metallic member with recess in register with the diaphragm aperture to form a diaphragm box and bolts passing through said diaphragm Copies of this patent may be obtained for with the secondary is established through the pipe 0 V I gether with means v sides of said diaphragm box 0uts1de the area tomatic musical instruments of the type described, a wind chest comprising a flattened rectangular metallic tube common to all the notes and apertured on its opposite faces to receive on one face a valve and on the other face a diaphragm, in combination with, for each note,a member recessed to form a diaphragm box arranged transversely of the wind chest and having portions extending beyond the opposite sidesiof the'latter, to-

engaging the opposite of the wind chest and serving to hold the same in assembled position on said wind chest, substantially as described.

l. In a pneumatic control system for au tomatic musical instruments of the type described, a wind chest comprising a flattened rectangular metallic tube common to all the notes and apertured on its opposite faces to. receive on one face a valve and on the other face a diaphragm, in combination with, for each note, a single integral metallic member above and a single integral metallic member below the wind chest, each recessed to form a box, the one for a valve and the other for a diaphragm, andmeans for securing said recessed members in adjusted position in register with the holes in the opposite faces of the wind chest, substantially as described.

In testimony whereof we have signed our names to this specification, in the presence of two subscribing witnesses.

RENE SAVOYE. URBAIN DRYvERs.

Witnesses: V

L'iioN PELLLET, Rmvn NEYRAT.

five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

